What type of oil does Chevy recommend?
Chevrolet generally requires engine oil that meets the Dexos1 Gen 2 specification for most gasoline engines, with common viscosities being 0W-20 or 5W-30 depending on the model and climate. Diesel engines such as the Duramax typically require Dexos2-rated oil. Always check your vehicle’s owner's manual or GM service information for the exact specification and viscosity for your engine.
Chevrolet oil specifications at a glance
The following quick reference highlights the core specifications you’re likely to see when shopping for Chevy oil, along with the typical viscosities used by many models.
- Gasoline engines: oil must meet Dexos1 Gen 2 specification.
- Diesel engines (Duramax): oil must meet Dexos2 specification.
- Common viscosities: 0W-20 or 5W-30, depending on engine design and climate.
- Oil type: many modern Chevrolet engines operate best on full synthetic or synthetic-blend oils; some older or special-use engines may specify conventional oil if allowed by the manual.
Always confirm the exact specification and viscosity for your model year and engine in the owner’s manual or GM service documentation.
Dexos certifications explained
Dexos1 Gen 2 is the gasoline-engine standard used by Chevy for improved protection and performance, while Dexos2 covers diesel engines. Oils labeled Dexos1 Gen 2 or Dexos2 are designed to meet GM’s warranty and performance requirements; using non-Dexos oils can affect warranty coverage and engine protection.
How to choose oil for your Chevy
To ensure you’re meeting Chevrolet’s requirements, follow these practical steps when selecting oil for your vehicle.
- Identify your engine type and model year, and locate the recommended specification in the owner's manual.
- Look for oils that are labeled Dexos1 Gen 2 if you have a gasoline engine; look for Dexos2 if you have a Duramax diesel.
- Choose a full synthetic or synthetic-blend oil unless the manual specifies conventional oil as acceptable.
- Verify the correct viscosity for your climate and driving conditions (commonly 0W-20 or 5W-30).
- Adhere to the manufacturer’s oil-change interval, which may be shorter or longer depending on oil type and usage (synthetic oils often allow longer intervals).
Following these steps helps ensure your engine is properly protected and maintains warranty compliance.
Special cases and warranty notes
Some models or markets may have variations in oil requirements. For example, while Dexos2 is standard for diesel engines in many Chevy truck and van lines, certain regional models or older gasoline engines may have different allowances. If you’re unsure, consult a Chevrolet dealer or GM TechLink for model-specific guidance and to confirm warranty coverage related to oil choices.
Additional considerations for owners
Beyond Dexos certification, consider your driving habits and local climate. Severe operating conditions (extreme temperatures, heavy towing, frequent short trips) can influence oil-change intervals and the decision to use a higher-viscosity oil within the recommended range. Always pair oil selection with a quality filter and follow GM’s recommended service schedule.
Summary
Chevrolet’s oil guidance centers on Dexos certification rather than a single viscosity. For most gasoline engines, use Dexos1 Gen 2 oil with a viscosity specified in the owner's manual (commonly 0W-20 or 5W-30). Diesel Duramax engines require Dexos2 oil. Always verify the exact spec and viscosity for your vehicle in the owner’s manual or GM service information, and choose synthetic or synthetic-blend oils as recommended. Proper oil selection supports engine protection, performance, and warranty compliance.
